Effects of Conventional and Severe Shot Peening on Residual Stress and Fatigue Strength of Steel AISI 1060 and Residual Stress Relaxation Due to Fatigue Loading: Experimental and Numerical Simulation

Erfan Maleki; Gholam Hossein Farrahi; Kazem Reza Kashyzadeh; Okan Unal; Mario Gugaliano; Sara Bagherifard

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저자정보: Erfan Maleki (Politecnico di Milano) Gholam Hossein Farrahi (Sharif University of Technology) Kazem Reza Kashyzadeh (Peoples’ Friendship University of Russia (RUDN)) Okan Unal (Politecnico di Milano) Mario Gugaliano (Karabuk University) Sara Bagherifard (Politecnico di Milano)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.8

발행연도: 2021.1

수록면: 2,575 - 2,591 (17page)

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This study investigates and compares the efects of diferent shot peening treatments including conventional and severe shotpeening on microstructure, mechanical properties, fatigue behavior, and residual stress relaxation of AISI 1060 steel. Shotpeening treatments were applied with two Almen intensities of 17 and 21 A and a wide ranges of coverage (100%–1500%). Various microstructural observations were carried out to analyze the evolution of microstructure. Microhardness, residualstress and surface roughness measurements and also axial fatigue test were performed. Moreover, the extent of the residualstress relaxation during cyclic loading was investigated by means of XRD measurements. Furthermore, numerical simulationof residual stress relaxation due to fatigue loading was carried out and validated against experimental investigations. Thecomparison indicated a good agreement for the surface residual stress relaxation up to 100 cycles. The experimental resultsindicated the efciency of severe shot peening processes in obtaining nanostructured surface layer and achieving superiormechanical properties and fatigue behavior. Also, residual stress measurements revealed that stress relaxation started witha high rate at the initial stages of loading and gradually increased at higher number of cycles which was lower in the case ofseverely shot peened samples compared to the conventionally treated ones.

#Shot peening · Fatigue behavior · Mechanical properties · Residual stress relaxation · Numerical simulation

참고문헌 (43)

참고문헌 신청

G. H. Farrahi / 1995 / Fatigue Fract. Eng. M 18:211

R. Karimbaev / 2020 / Mater. Sci. Eng. A 791:139752

E. Maleki / 2018 / Surf. Interfaces 11:82

Y. Huang / 2013 / Mater. Today 16:85

C. Koch / 2009 / Bulk Nanostructured Materials / Wiley :1~20

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